Welcome to the Winobloggers webpage! Students and professors from different universities meet to discuss their findings on Winogradsky columns they constructed!
We learn how to formulate hypotheses, observe, comment, ask and reply to questions related to our scientific experiments.

Winogradksy columns

'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Thursday, 7 April 2016

UCA_4A-7A_2: Day 35 - There is life!

Rio San Pedro sediment + 30g NaCl + filter paper+ 1.51g CuSO4

When the column is in the light side, we can observe that little seaweeds have grown up on the
surface, while on the bottom, purples bacterias have shown up. Also, the iron
oxide has increased his amount, the column is redder. And we can see a little
sea snail moving, which proves that it is alive.

When the
column is in the dark side, we note that the column is warmer than on the light
side. If you look closely, you can appreciate oxide on the surface. At the
bottom, we can see more iron sulfide than last week because of the next
reaction:

H2S + FeàFeS + H2

We can also
see that there is something strange and black on the walls of the bottle, we do
not really know what is it, but we think it could be some kind of oxide.

We have
discovered that there is a dead worm that previously has done tunnels. Because
the worm is dead, we suppose that this side is worse for life to be in.

We will come back the next week!

Picture 1. Picture 2.

Picture 3.

Picture 1: left: column in the dark side. Right: column in the light side, face of the light.

Picture 2: left:column in the dark side. Right: column in the light side, face of the dark.